Mo. Rev. Stat. § 30.070
Current with changes from the 2023 Legislative Session
When a vacancy occurs in the office of state treasurer, the governor shall immediately appoint a state treasurer to fill such vacancy for the residue of the term in which the vacancy occurred, and until his successor is elected or appointed, commissioned and qualified.
§ 30.070, RSMo
RSMo 1939 § 13016, A.L. 1945 p. 1977 § 6